
a value of the variational energy \(E>E_{th}\)  simply means that binding is not found. The lowest energy of the 4-body Hamiltonian is \(E_{th}\) . This is confirmed by the observation that the color content of the variational wave function tends to \(1/3\)  T and \(2/3\)  M, corresponding to a meson-meson decomposition.

the energy with a frozen M color wave function, not shown, is higher than for T, except near \(M=m\) , as discussed, e.g., in [1]}.

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